I have the same error "still waiting for root device" before Install screen appears
tried different versions from retails to edited versions
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TOSHIBA Satellite A505-S6005
BIOS:
Insyde v1.20
Processor:
Dual Core Intel Core i3 M330
L1 cache 32 KB
L2 cache 256 KB
L3 cache 3 MB
Chipset:
North Bridge: Intel Ironlake-M IMC
South Bridge: Intel Ibex Peak-M HM55
Graphics:
Intel Graphics Media Accelerator HD (Core i3)
Sound:
Realtek ALC272 HD Audio controller
Network:
Realtek RTL8139/810x Fast Ethernet Adapter PCI
Realtek RTL8191SE Wireless LAN 802.11n PCI-E Network Adapter PCI